231cornelius
16.10.2019 •
Mathematics
Pipe a takes 10 hrs to fill a tank but due to a leakage, it takes 5 hrs more. how long will a leak take to empty the tank if it is completely filled?
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Ответ:
A. 45h = 1,575
Step-by-step explanation:
Area of trapezoid = 1,575 cm² (given)
We are given the length of both bases, a = 63 cm and b = 27 cm
We need to find the formula that will enable us determine its height (h).
Thus:
Area of trapezoid = ½(a + b)h
Plug in the values
½(63 + 27)h = 1,575
½(90)h = 1,575
45h = 1,575
The answer is A. 45h = 1,575